diff --git a/pyproject.toml b/pyproject.toml
index 7be0a6d..4860e7e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -16,7 +16,7 @@ pysrt = "^1.1.2"
 pyvtt = "^0.0.4"
 chardet = "^5.1.0"
 pyasstosrt = "^1.3.1"
-pydantic = "^1.10.4"
+pydantic = "<2.0.0"
 
 
 [build-system]